The Los Angeles Clippers went through a pre-match routine on Sunday with shirts on inside-out to hide the team’s logo.
The National Basketball Association is investigating a report on celebrity news website TMZ that Clippers owner Donald Sterling made the remarks.
Mr Sterling has told TMZ the recording “does not reflect his views”.
The Clippers were playing the Golden State Warriors in Oakland on Sunday in a crucial NBA play-off but the clash was overshadowed by the recorded comments allegedly made by the 80-year-old tycoon.
The players also wore black wristbands or armbands and all wore black socks with their normal jerseys.